Metal-founding apparatus



(No Model.)

G. W. VAN TINE.

METAL FOUNDING APPARATUS.

No. 412,905. Patented Oct, l5, 1889.

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.A 'ff fl A nu g n Attorney UNITED STATES VPATENT OFFICE.

GEORGE W. VAN TINE, OF ELIZABETH, NEW` JERSEY.

METAL-FOUNDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 412,905, dated October 15, 1889. 1 Application led January 4, 1889- Seral No. 295,412. (No model.)

To @ZZ whom, it may concern:

Be it known that I, GEORGE W. VAN TINE, of Elizabeth, Union county, New Jersey, have invented certain new and useful Improvements in Metal-Founding Apparatus, of which the following is a specication.

This invention pertains to metal-founding apparatus, and relates to an arrangement of sand-box and stripping-plate for use in connection with molding-machines.

My invention will be readily understood from the followingdescription, taken in connection with the accompanying drawings, in which- Figure 1 is a side elevation of an apparatus exemplifying my invention, a portion of the sand-box E appearing in vertical section upon the line ct of other figures; Fig. 2, an end elevation of the same, the sand-box at one end appearing in vertical section at line b of other figures; Fig. 3, a plan at one end of the apparatus, various portions being broken away to exhibit the structure below them, and certain portions appearing in horizontal section upon the line c of other figures; and'Fig. 4, an enlarged side elevation, part section, of one of the latchment structures of the stripping-plate, the slot portion ot' the sand-box being indicated by dotted lines.

In the drawings, A indicates a supportingsurface for the apparatus, which surface may be taken as corresponding with the lower press-surface of` a metal-founders moldingpress, or as the top of the molding-car if a car is used invconnection with the press for the purpose of conveying the flasks into and out of the press; B, a table resting upon the supportingsurface mention ed an d presenting a horizontal surface for the support of the pattern; C, the pattern formed with or secured to the top of the pattern-table, the pattern being illustrated as representing a rectangular plate with a rectangularboss; D, pins projecting upwardly from the patterntable at various points around the pattern, the object of these pins being to provide for the stripping-plate a su pport whose accurate function is not liable to be interfered with by the presence of slight bodies of sand; E, the sand-box, consisting of a rectangular box, open at the top and bottom and having interior dimensions a trifle in excess of those of the pattern-table; E, the upper rim-surface of the sand-box, this being the surface on which the flask is to rest, it being understood, of course, that the flasks which will be employed will be of a size properly corresponding to that of the sand-box-that is to say, the interior of the flasks will be of substantially the same horizontal dimensions as the interior of the sand-box; G, the stripping-plate, resting by its own Weight upon the pins D, the outside of this stripping-plate tting the inside of the sand-box and the interior of the stripping-plate fitting the pattern, as usual; H, springs, one at each corner of the sandbox, tending to press the sand-box upwardly; J, stop-rods, one at each corner of the sandbox, serving to limit the upward and downward motion of the sand-box, and-provided with nuts by which these limits can be adjusted, these stop-rods being illustrated as secured at their feet to the supporting-surface A and passing upward through lugs upon the sand-box, it being understood that the sand-box is free to play up and down upon these rods; K, rubber washers interposed betwcen such lugs and the nuts which limit the upward movement of the sand-box, the obj ect of these washers being to prevent jar as the sand-box rises against the top stopnuts; L, slots (shown as' four in number) in the sides of the sand-box, each slot consisting of a vertical part terminating in a horizontal part, whereby an upwardly-presenting shoulder is formed near the top of the slot; M, hangers projecting downwardly from the stripper-plate, one at each of said slots; N, a roller projecting outwardly from each of said hangers, each roller engaging one of the slots in the sand-box; O, a horizontal sliding block in each hanger, these blocks carrying the rollers and permitting a horizontal movement of the rollers by the sliding of the blocks in horizontal slots in the hangers; P, a spring in each hanger acting on the roller-block and tending to press the blocks and roller in the direction of the horizontal part of its slot in the sand-box; Q, a bevel-ended bolt attached to each roller-block and presenting its end beyond the hanger, so that as the roller and block moves back and forth in its slot in the IOO ' distance corresponding with the desired compression of the sand.

The operation of the apparatus is as follows: The half-flask is placed upon the sand-box and filled with sand. Sand thus fills the half-flask and the sand-box down to the top of the stripper-plate. The apparatus is now placed in the molding-press and the halfflask pressed downwardly or the supportingsurface pressed upwardly, as the case may be. The result of the pressure is that the flask and sand-box move downwardly until the upper surface of the stripping-plate is even with the surface F of the sand-box, thus compressing into the flask the sand which was previously in the sand-box, whereby all of the sand in the flask has been compacted around the pattern. During the downward movement of the sand-box the springs H have yielded to permit the movement, which will continue until the stop-rods prevent a further -descent of the sand-box, the stripping-plate meanwhile occupying` its normal position upon the pins of the pattern-table. Vhen the sand-box has descended to the limit indicated, then the rollers will have been forced` by their springs into the horizontal portions of the slots in the sand-box, thus causing each roller to engage over the horizontal shoulders of these slots, and at the same time the bolts Qwill have become projected. The effect of the rollers engaging in the horizontal parts of the slots of the sand-box is to lock the stripping plate to the sand-box. When the sand-box and fiask descend under the action of the press, the stripping-plate remains stationary with the pattern. When the pressure is removed from the flask, the springs H react and push the sand-box and flask upwardly. The stripping-plate, being locked to the sand-box, goes up with the sand-box and holds up the sand around the pattern as the mold rises from the pattern. When the sand-box reaches its upper position, carrying the stripping-plate with it, the ends of the bolts Q will engage the lugs R, and will be thereby forced inwardly, thus pushing the rollers off of the shoulders of the slots in the sand-box, whereupon the stripping-plate drops again to its normal position upon the pins upon the pattern-table, thus restoring the parts to the original position, ready for a new flask. A counterbalancingweight system would obviously be the equivalent of the spring system as a means for lifting the sand-box. A

The special latchment described for engaging and disengaging thek stripping-plate to and from the sand-box is presented simply as the preferable exempliiication of the system.

I claim as my inventionn l. In metal-founding apparatus, the combination, substantially as set forth, of a table for the support of the pattern, a sand-box surrounding the saine and adapted for vertical motion with reference thereto, springs supporting the sand-box, a stripping-plate tting the sand-box and pattern and supported normally by said table, and a latchment adapted for uniting the stripping-plate to the sand-box.

2. In metal-founding apparatus, the combination, substantially as set forth, of a table for the support of the pattern and provided with upwardly-projecting pins, a sandbox surrounding the table and fitted for vertical motion with reference thereto, springs supporting the sand-box, a stripping-plate fitting the sand-box and pattern and supported normallyA by the pins on the table, and a latchment adapted for uniting the stripping-plate to the sand-box.

3. In metal-founding apparatuathe combination, substantially as set forth, of a table for the support of the pattern, a sand-box surrounding the same and adapted for vertical motion with reference thereto and provided with upwardly-presenting shoulders adapted to be engaged by rollers, springs for supporting the sand-box, a stripping-plate fitting the san d-box and pattern, rollers attached to the stripping-plate and arranged for horizontal movement with reference thereto and adapted to engage the before-mentioned shoulders of the sand-box, springs urging said rollers in the direction to engage said shoulders, and lugs upon the table arranged to move said rollers out of engagement with the shoulders.

4. In metal-founding apparatus, the combination, substantially as set forth, of a table for the support of the pattern, a sand-box surrounding the same and adapted for vertical motion with reference thereto and provided with horizontal shoulders adapted to be engaged by rollers, springs for supporting the sand-box, a stripping-plate fitting the sandbox and pattern and supported normally by said table, hangers projecting from the stripping-plate and provided with rollers, springs urging said rollers in the direction to engage the before-mentioned horizontal shoulders of the sand-box, bolts projecting from the rollerblocks, and lugs upon the pattern table adapted to engage said bolts and urge the rollers out of engagement with said shoulders.

5. In metal-founding apparatus, the combination, substantially as set forth, of a table IOO IIO

for the support of the pattern, asand-box surment adapted for uniting the stripping-plate rounding the same and adapted for Vertical to the sand-box.

motion with reference thereto sprin o's for supporting the sand-100x, stops for liriiting the GEORGE W' VAN TINE' 5 vertical motion of the sand-box, a strippinb- Witnesses:

plate fitting the sand-box and pattern and HARRIS TABER, supported normally by said table, and a latoh- CHARLES NETTLETON. 

